Truck Brawler

Defeat 10 enemies using hand-to-hand combat on the back of the convoy trucks.

For this Trophy, all you have to do is kill enemies with melee combat in Chapter 20. When you're riding your horse and are near the first car in the convoy, jump to it. Press Square and you should pull the guy off of the car. Next, go back to your horse and move on to the next car, repeating the process. After the fourth or fifth enemy, allow the enemies to kill you. The game will allow you to restart from a checkpoint and repeat the process. The Trophy will then pop up.